R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 10-04-2010, 06:54 AM   #1
Tech Regular
 
UncleStudweiser's Avatar
 
Join Date: Apr 2009
Location: Parts Unknown
Posts: 252
Default Nova p5xlt help?

Hey guys, I just bought the new nova p5xlt. The break in when went fine, now I'm having a hard time finding the tune. I've been running the 053 pipe with odonnel 97t plugs. Random flames and change in the tune while running. Any suggestions or ideas would help. I had the old p5xl and it ran great for a long time but I can't seem to find the tune with the turbo plug. Thanks.
__________________
Team FISH-DO
Brian "Brain" Ingram/// Mugen/Futaba/OS Speed/Mels Shells///
/// "Id rather be looking at it, then for it"
Stay classy......
UncleStudweiser is offline   Reply With Quote
Old 10-04-2010, 07:03 AM   #2
Tech Master
 
Torian4000's Avatar
 
Join Date: Nov 2008
Location: South Dakota
Posts: 1,119
Trader Rating: 49 (100%+)
Default

Random flameouts and changes in tune while running usually indicate some sort of air leak. Check your fuel tank for leaks or crack and make sure there are no cracks in your fuel lines. As a precaution, I always seal my engines up at the backplate and base of the carb.
Torian4000 is offline   Reply With Quote
Old 10-04-2010, 07:17 AM   #3
Tech Regular
 
UncleStudweiser's Avatar
 
Join Date: Apr 2009
Location: Parts Unknown
Posts: 252
Default

Quote:
Originally Posted by Torian4000 View Post
Random flameouts and changes in tune while running usually indicate some sort of air leak. Check your fuel tank for leaks or crack and make sure there are no cracks in your fuel lines. As a precaution, I always seal my engines up at the backplate and base of the carb.
I did just put a new fuel tank and fuel line on. I will try to seal the carb and backplate. It did backfire going down the staright then flamed. What would make it backfire?
__________________
Team FISH-DO
Brian "Brain" Ingram/// Mugen/Futaba/OS Speed/Mels Shells///
/// "Id rather be looking at it, then for it"
Stay classy......
UncleStudweiser is offline   Reply With Quote
Old 10-05-2010, 05:25 AM   #4
Tech Master
 
killabud's Avatar
 
Join Date: Mar 2007
Location: SE PA
Posts: 1,170
Trader Rating: 1 (100%+)
Default

TTT
__________________
Tom Ulmer Team FISH-DO
---\\\Kyosho MP9 TKI3///---
\\\Futaba|OS Engines|VP Powermaster///
Baby Car!!!!!!!
killabud is offline   Reply With Quote
Old 10-05-2010, 05:37 AM   #5
Tech Regular
 
Join Date: Apr 2010
Posts: 418
Trader Rating: 9 (100%+)
Default

How much break in have you done? Sounds like its not broken in yet. With my P5 I would try to lean the high end out and it would flame down the straight(was still blowing a ton of smoke wasn't "too lean").

Ran it more and more and finally was able to lean it out.
__________________
Losi 8T 2.0 - Novarossi P5 Modded - JR 9100HVS' - Odonnell Fuel -
Mugen MBX6 - Novarossi +4 Modded - Hitec 7940TH's - Hudy Tools
Andy Z is offline   Reply With Quote
Old 10-05-2010, 06:30 AM   #6
Tech Regular
 
UncleStudweiser's Avatar
 
Join Date: Apr 2009
Location: Parts Unknown
Posts: 252
Default

Quote:
Originally Posted by Andy Z View Post
How much break in have you done? Sounds like its not broken in yet. With my P5 I would try to lean the high end out and it would flame down the straight(was still blowing a ton of smoke wasn't "too lean").

Ran it more and more and finally was able to lean it out.
It has about a gallon of break in time. It was flaming on the top just like you said. Maybe that's the issue. Any idea where your needles are set. Maybe I can get a close start. Thanks guys. The advice is much appreciated.
__________________
Team FISH-DO
Brian "Brain" Ingram/// Mugen/Futaba/OS Speed/Mels Shells///
/// "Id rather be looking at it, then for it"
Stay classy......
UncleStudweiser is offline   Reply With Quote
Old 10-05-2010, 07:16 AM   #7
Tech Elite
 
Join Date: Jun 2006
Location: Omaha,NE
Posts: 2,549
Trader Rating: 85 (99%+)
Default

Quote:
Originally Posted by UncleStudweiser View Post
It has about a gallon of break in time. It was flaming on the top just like you said. Maybe that's the issue. Any idea where your needles are set. Maybe I can get a close start. Thanks guys. The advice is much appreciated.

If you've ran a gallon it's not fully broken in yet, I'm not at home but I would start flush on both needles and make sure your idle gap is set properly, the last new p5xlt that I broke in took a little over two gallons before it broke in, you will know when it's broken in as the motor will super rich all of a sudden when your on the track, take your time breaking it in and you will be rewarded. I'm not saying you have to putt around for two gallons but it needs to be a little rich or about 85-90 percent race tune to get the proper lubrication.
WideOpenThrottle RC is online now   Reply With Quote
Old 10-05-2010, 07:35 AM   #8
Tech Lord
 
Frank L's Avatar
 
Join Date: Dec 2008
Location: NorCal
Posts: 12,500
Trader Rating: 148 (100%+)
Default

I broke in a powerhouse p5 for a buddy of mine a few months ago and idk where the needles ended up but when I am in doubt I reset back to stock and then retune. His p5 came box stock with LSN 4 1/4 turns out and HSN 3 1/2 turns out. I hope that helps. It does sound like theres an air leak.
__________________
- X-Ray/ RC America Team Driver - MKS -
- XB8 - XB8T - XB8 E - OS Spec III - B2102 - 4PXR -
~ SSC ~ Godfather ~ Ironman ~ ButterySmooth ~
Frank L is offline   Reply With Quote
Old 10-05-2010, 07:42 AM   #9
Tech Regular
 
UncleStudweiser's Avatar
 
Join Date: Apr 2009
Location: Parts Unknown
Posts: 252
Default

I sealed everything up last night and I will reset the needles. Test and tune day on saturday. Thank you guys for all the help. I will keep you informed. All input is welcome and appreciated. Any other ideas, please keep them
coming.
__________________
Team FISH-DO
Brian "Brain" Ingram/// Mugen/Futaba/OS Speed/Mels Shells///
/// "Id rather be looking at it, then for it"
Stay classy......
UncleStudweiser is offline   Reply With Quote
Old 10-05-2010, 10:47 AM   #10
Tech Regular
 
Join Date: Apr 2010
Posts: 418
Trader Rating: 9 (100%+)
Default

Not too sure about my needles but sounds like your on the right track by resetting the needles. Good advice frank, best of luck with the motor
__________________
Losi 8T 2.0 - Novarossi P5 Modded - JR 9100HVS' - Odonnell Fuel -
Mugen MBX6 - Novarossi +4 Modded - Hitec 7940TH's - Hudy Tools
Andy Z is offline   Reply With Quote
Old 10-05-2010, 11:13 AM   #11
Tech Regular
 
UncleStudweiser's Avatar
 
Join Date: Apr 2009
Location: Parts Unknown
Posts: 252
Default

Twice now the car has backfired... Once on the starter box and once going down a straight. What would cause that?
__________________
Team FISH-DO
Brian "Brain" Ingram/// Mugen/Futaba/OS Speed/Mels Shells///
/// "Id rather be looking at it, then for it"
Stay classy......
UncleStudweiser is offline   Reply With Quote
Old 10-05-2010, 12:03 PM   #12
Tech Addict
 
Join Date: Mar 2010
Posts: 614
Trader Rating: 8 (100%+)
Default

Maybe you are getting some predetonation. Could be a head shim issue.
__________________
Losi 8ight T 2.0 - Mugen Ninja
Mugen Eco - Tekin 1900KV RX8
Byrons 30%
Spektrum
Proline/J Concepts/AKA
bacchus is offline   Reply With Quote
Old 10-05-2010, 12:37 PM   #13
Tech Elite
 
merdith6's Avatar
 
Join Date: Oct 2009
Location: Brazoria, TX
Posts: 2,350
Trader Rating: 3 (100%+)
Default Could be

The new p5's come shimmed at .80 for 30% nitro fuel. I would put a .10 shim in place of the .20. The thinner of the shims installed. there is two alluminum shims that are .30 each, and one brass shim that is .20 tock. So changing the .20 should help.

The top end should be flush and then tune the bottom end to fit. you could need to turn the idle down and lean the bottom end a bit. If the bottom is fat to compensate for the high idle, that could load it up in the turn, then when you hit full throttle there is too much fuel already in the engine and can flame....Usually during late break in when the idle drops because the engine fattens up....
__________________
Mad Dog drives a Mugen MBX-7, Novarossi engines, Clockwork Racing, Futaba radio, AKA/Proline Tires
merdith6 is offline   Reply With Quote
Old 10-05-2010, 05:27 PM   #14
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

if you are running 30% , shimming works very well , every pipeset makes different needle settings but a good base starting point is 4.25 on low speed
( pull slide barrel out when adjusting) and 3.75 on high speed , idle .75 turns out from just closed ( restrictor out )


the p5xlt is a very nice running engine with much room for improvement over stock , the long low speed needle carb is the tricky part but not impossible , just another learning curve
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 10-06-2010, 06:47 AM   #15
Tech Regular
 
UncleStudweiser's Avatar
 
Join Date: Apr 2009
Location: Parts Unknown
Posts: 252
Default

Quote:
Originally Posted by houston View Post
if you are running 30% , shimming works very well , every pipeset makes different needle settings but a good base starting point is 4.25 on low speed
( pull slide barrel out when adjusting) and 3.75 on high speed , idle .75 turns out from just closed ( restrictor out )


the p5xlt is a very nice running engine with much room for improvement over stock , the long low speed needle carb is the tricky part but not impossible , just another learning curve
What plug would you recommend?
__________________
Team FISH-DO
Brian "Brain" Ingram/// Mugen/Futaba/OS Speed/Mels Shells///
/// "Id rather be looking at it, then for it"
Stay classy......
UncleStudweiser is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
werks b6 vs nova p5xlt roots Nitro Off-Road 72 08-12-2010 05:29 AM
Troubleshooting Gods; I need your help!!! CTurbo Nitro Off-Road 15 01-18-2010 02:14 AM
just a lil more nova p5xlt brake in help please bigguyrc8 Nitro Off-Road 6 01-01-2010 08:39 PM
nova p5xlt brake in help. bigguyrc8 Nitro Off-Road 12 12-31-2009 01:01 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:17 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net